Calculating-machine



C. VI. F. FRIDEN.

CMCULATING` MACHINE. APPL'ICATION FILED NOV. Il. |919.

1,379,009. Patented May-24,' 19121.

-2 SHEETS-SHEET l.

c.M. F. FRIDEN.

CALCULATING MACHINE.

APPLICATION FILED NOV- ILIQIQ.A

1,379,009. I I Patented May y24, 1921.'

2 SHEETS-SHEET 2.

WITNESS:

"von N HYS UNITED STATES PATENT OFFICE.

CARL M. F. FRIDEN, 0F PIEDMONT, CALIFORNIA, ASSIGNOR TO MARCHANT CALCU- LATINGr MACHINE COMPANY, 0F OAKLAND, CALIFORNIA, A CORPORATION OF CALIFORNIA.

CALCULATING-MACHINE.

Specification of Letters'Patent.

Patented May 24, 1921.

of the adjusting wheels are brought into and moved out of operating position,the rotation of the wheels being effected by a handle which projects to the outside of the machine.

The values adjusted on the tooth adjusting wheels are transmitted on the rotation of the crank handle, indirectly, by means of vintermediate wheels, to the figure disks of the counting mechanism which, for the purpose of making the direct action of the units toothed adjusting wheel on the intermediate wheel of the figure disks of higher value possible, is disposed in parallel displaceable relation to the adjusting mechanism axis. In such calculating machines` the counting mechanism or wheels indicating the cranle revolutions, is located on the carriage of thedisplaceable main registering mechanism connected thereto. The main registering mechanism, or series of figure disks., is provided with a Zero setting. handle or knob, and the revolution indicating mechanism, or series of figure disks, is similarly provided with a Zero setting handle or knob, the Zero setting mechanisms being operable in all displaced positions of the carriage.

It frequently happens that the operator accidentally or deliberately rotates the main crank handle during the time that the Zerosetting mechanisms, or either of them, are out of neutral or inoperative position with the result thatthe machine is injured or damaged.

An object of the invention, therefore, is to provide means for preventing the rotation of the tooth adjusting wheels during the 'time that a Zero setting device is m operative or out of neutral position. By neu- M. F. FRIDEN,

tral position is meant the normal position ofrest of the zero setting handle or knob.

The invention possesses other advantageous features, some of which, with the foregoing, will be set forth at length in the following description, where I shall outline in full, that form of the invention which I have selected for illustration in the drawings accompanying and forming part of the present specification. In said drawings have shown one specific embodiment of my invention, but it is to beunderstood that I do not limit myself to such form, since the invention, as expressed in the claims, may be embodied in a plurality of forms.

Referring to said drawings:

Figure l is a plan or top view of a portion of one form of calculating machine, with the case partly broken away.

Fig. 2 is a vertical section taken on theV line 2-2, Fig. 1.

fFig. 3 is a plan view of a portion of the machine, with the counting disks and toothed wheels removed showing the connection between the crank handle and the locking means.

Fig. -t is a vertical section through the housing on the carriage.

Fig. 5 is a perspective view of the adjaj cent ends of the twov counter disk shafts.

The calculatingrmachine shown in the drawings, and which embodies the present invention, comprises a suitable frame having sides 3 4, in`which the shaft 5i of the adjusting tooth wheels l0 is journaled. The shaft is provided on the end adjacent the side t with a gear 6, which meshes with a gear 7 secured to the shaft 8, to which the crank handle9 is attached. The gears 6 and 7 are of the same size, so that one rotation of the crank handle producesone rotation of the toothed wheels. Each wheel carries a plurality of radially movable teeth 12, which are moved inwardly and outwardly, variable as tonumber, by cams arranged within or associated with the wheels. The cams are provided with projecting fingers 13 so that they may be readily moved circumferentially to vary the number of projectingteeth.

Arranged on the frame adjacent the toothed wheels, and parallel to the axis thereof, are one or more series of figure disks, in the present instance there being two series of figure disks 14 and 15, the series 14 indicating the result of the calculation and the series 15 indicating the crank handle revolutions. T he values adjusted on the toothed wheels are transmitted to the figure disks 14, through the small toothed wheels 16, operatively connected to the iigure disks 14. rlihe crank handle revolution counter figure disks l5 are rotated by the small toothed wheels 17, which are in turn moved by a pin or finger 18 carried by the,

gear 19, Awhich is enmeshed with the .gear 21 on the end of the shaft 5 adjacent the side 3. The gears 19 and 21 are of the same size, so that ear 19 rotates once and advances a figure disk 15 one space, for eachrevolution of the' crank handle. The various figure disks 1n each series are suitably connected by tens-carrying mechanism, to

cause the rotation of one disk through acomplete revolution to advance the disk of the next higher denomination one point. rlhe series of disks are also provided with suitable zero setting devices, operated by the nuts 22 and 23, which are secured to the shafts 24 and 25 on which the disks are mounted. The specific tens-carrying mechanism and the specific Zero setting mechanisms do not form part of the present invent1on, and are not illustrated or described herein. Any suitable tens-carrying mechamsm and any suitable zero sett-ing device may be employed. The operating nut or handle 22 of the zero setting device associated with the series of disks 14-is fixed `to the shaft 24 and the operatingl nut or riage 29, so that the registering mechanisms Aare displaceable for the purpose of making possible the direct action of the toothed wheels and the revolution counting finger on the intermediate Wheels of the figure disks of higher or lower value. Any suitable means may be employed for shifting the carriage in a step-by-step motion to the left or right, and since such movement of the carriage is old in the art and since the specific means forms no part of the present invention, it will not be described herein.

Arranged on or forming part of the carriage 29 is a housing 31, preferably interposed between the two series of figure disks and providing bearings for the' adjacent ends of the shafts 24 and 25, which adjacent ends are in proximate contact. rThe end of each shaft is provided with a flat longitudinal alinement when the nuts 22 and 23 are in neutral position. Mounted in the housing 31, with its inner end in contact with the attened portions 32, is a pin 33 which extends rearwardly and downwardly from the housing and which is held in retracted position by the spring 34. Rotation of either of the shafts 24-25 from the neutral position causes the round portion of the end of the shaft to bear against the end of fthe pin andino-ve the pin outward slightly and hold it in such projected position until the shaft is rotated to neutral position. lt is seen, therefore, that rotation of either Zerosetting nut 22#23 causes the pin to be pushed outward from the y against rotation, it is apparent that the shaft 5 and the crank handle 9 will be locked against rotation. rll`he shaft 35 is designed and arranged so that when the pin 33 is moved outwardly it engages the shaft and locks it against. rotation, locking the handle against rotation. ln the present embodiment, the shaft is provided with a plurality of longitudinallyspaced depressions 38,correspond ing in spacing to the positions of the carriage in its step-by-step movement, so that for all operative positions of the carriage, the pin is alined with a. depression. lWhen either zero setting nut 22-23 is moved from neutral position, the pin is moved into a depression locking the shaft against movement. The toothed wheels are, therefore, locked against movement, when the Zero setting devices are in operation or out of neutral position.

l claim :4

1. ln a calculating machine, a plurality of adjust-able tooth wheels, means for rotating said wheels, a plurality of figure disks disks, rotation of said shaft from a neutral position, through a cycle of rotation and back to the neutral position serving to set said ligure disks to zero, a rotatable member 'connected to and rotatable with said wheels,

and a pin disposed radially with respect to operating with said wheels, a zero setting mechanism associated with said disks and comprising a shaft extending through said disks, rotation of sai-d shaft from a neutral position, through a cycle of rotation and back to the neutral position, serving to set said figure disks to zero, a shaft operatively connected with and rotatable with said wheels, and a pin adapted to engage sai second shaft and prevent rotation thereof, said zero-setting shaft being formed to move said pin into engagement with said second shaft. f

4. In a calculating machine, a plurality of axially alined adjustable tooth wheels, means for-rotating said wheels, a carriage movable longitudinally with respect to the axis of said wheels, a plurality of figure disks arranged on said carriage and coperating with said wheels, a zero setting mechanism associated with said disks, comprising a shaft mounted in said carriage, rotation of which serves to set the figure Idisks to zero, a shaft o eratively' connected to and rotatable with said wheels, and a pin mounted in said carriage andengaging the end of said zero setting shaft and moved by rotation of the zero setting shaft into engagement with said second shaft.

5. In a calculating machine,a plurality of -axially alined adjustable tooth wheels,

means for rotating said wheels, a shaft connected to and rotatable with said wheels and provided with a plurality of longitudinally spaced depressions, a carriage movable longitudinally in a step-by-step motion with respect to the axis of said wheels, the length of the steps being equal to the spacing of the depressions, a plurality` of figure disks arranged on said carriage, a zero setting mechanism associated with said disks, and a longitudinally movable pin on said carriage adapted to be moved into one of said depressions by movement of the zero setting mechanism from neutral position.

6. In a calculating machine, a lurality of adjustable tooth Wheels, means or rotating said wheels, a plurality of figure disks cooperating with said wheels, a plurality of ligure disks cooperating with said rotating means, a zero setting mechanism associated with each plurality of disks and means operative when either zero setting mechanism is out of neutral position for locking said wheels against rotation.

7 In a calculating machine, a setting mechanism, a plurality of registering mechanisms associated with said setting mechanism, a zero setting mechanism for each registerng mechanism and means operative by the movement of either zero setting mechanism out of neutral position, for locking the setting mechanism.

8. In a calculating machine, a setting mechanism, two registering mechanisms, independently rotatable alined shafts on which said registering mechanisms are mounted and means operative by the movement'of either shaft out of neutral position for locking the setting mechanism.

9. In a calculating machine, a setting mechanism, a registering mechanism, a zero setting mechanism including a shaft extending through the registering mechanism, and a pin engaging the shaft and disposed radially with respect to the axis of the shaft, and adapted to be moved by rotation thereof into engagement with said setting mechanism.

10. In a calculating machine, a setting mechanism, a registering mechanism associated therewith, a zero setting mechanism associated with said registering mechanism and comprising a shaft extending through said registering mechanism and a pin adapted to lock said setting mechanism disposed radially with respect to the axis of the shaft, said shaft being formed to move said pin into engagement with said setting mechanism.

In testimony whereof, I have hereunto set my hand at Emeryville, California, this 27 th day of October 1919.

CARL M. F. FRIDEN.

Inpresence of R. H. MARGHANT. 

